University of Florida

ABE 6615
Advanced Heat and Mass Transfer in BIological Systems

Semester Taught - Spring (even years)

Catalog Description

Credits: 3

Analytical and numerical technique solutions to problems of heat and mass transfer in biological systems. Emphasis on nonhomogeneous, irregularly-shaoed products with respiration and transpiration.


CGS 3422 and AGE 3612C


William Pelletier
Room 101 Rogers Hall
Phone: 392-1864 x101

Material/Supply Fees


Class Materials Required

Reference Materials

  • Luikov, A.V. Analytical Heat Diffusion Theory. Academic Press,
    N.Y. 1968

    Segerlind, L.J. Applied Finite Element Analysis. John Wiley and
    Sons. 1976

    Various technical papers

    ANSYS Finite Elements Software Package

Course Outline

  • Review of analytical heat diffusion theory
    • Fundamental Fourrier heat conduction law
    • differential heat conduction equation
    • solutions for semi-infinite body, plate, sphere, and cylinder
  • Mass transfer
    • Fick's law
    • the Lewis relation
    • simultaneous heat and mass transfer; enthalpy potential
    • transpiration of fruits and vegetables
    • effects of: vapor pressure, deficit air movement, respiration, size, shape ,surface structure
    • mathematical modeling
    • procedures for measuring transpiration rates
  • Finite difference methods
    • simulation of transient heat flow in non-homogeneous biological materials of spherical shape (one dimensional), irregular shape (multi-dimensional) under different boundary conditions
    • effect internal heat generation due to respiration
    • effect of evaporative cooling
    • effect of condensation
  • Cooling of bulk loads of fruits and vegetables
    • methods
    • computer simulation
  • Finite element analysis
    • fundamentals of finite element method
    • analyses using ANSYS software
  • Freezing of food products
    • simplified equations
    • migration isotherm method
    • numerical simulation methods
  • Drying of agricultural products
    • thin-layer equations
    • the log model
    • computer simulation of deep-bed drying


Grading Method Percentage
Homework 30%
Midterm exam 35%
Final exam 35%

Academic Honesty

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Accommodation for Students with Disabilities

Students requesting classroom accommodation must first register with the Dean of Students Office. That office will provide the student with documentation that he/she must provide to the course instructor when requesting accommodation.

Use of Library, Personal References, PC Programs and Electronic Databases

These items are university property and should be utilized with other users in mind. Never remove, mark, modify nor deface resources that do not belong to you. If you're in the habit of underlining text, do it only on your personal copy. It is inconsiderate, costly to others, and dishonest to use common references otherwise.

Software Use

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UF Counseling Services

Resources are available on-campus for students having personal problems or lacking clear career and academic goals which interfere with their academic performance. These resources include:

  1. University Counseling Center, 301 Peabody Hall, 392-1575, personal and career counseling;
  2. Student Mental Health, Student Health Care Center, 392-1171, personal counseling;
  3. Center for Sexual Assault/Abuse Recovery and Education (CARE), Student Health Care Center, 392-1161, sexual assault counseling;
  4. Career Resource Center, Reitz Union, 392-1601, career development assistance and counseling.